<template>
    <div>
      <div class="person-info-head" @click="editCropper()"><img v-bind:src="options.img" title="点击上传头像" class="img-circle img-lg" /></div>
      <el-dialog :title="title" :visible.sync="open" width="800px" append-to-body @opened="modalOpened"  @close="closeDialog">
        <el-row>
          <el-col :xs="24" :md="12" :style="{height: '350px'}">
            <vue-cropper
              ref="cropper"
              :img="options.img"
              :info="true"
              :autoCrop="options.autoCrop"
              :autoCropWidth="options.autoCropWidth"
              :autoCropHeight="options.autoCropHeight"
              :fixedBox="options.fixedBox"
              :outputType="options.outputType"
              @realTime="realTime"
              v-if="visible"
            />
          </el-col>
          <el-col :xs="24" :md="12" :style="{height: '350px'}">
            <div class="avatar-upload-preview">
              <img :src="previews.url" :style="previews.img" />
            </div>
          </el-col>
        </el-row>
        <br />
        <el-row>
          <el-col :lg="2" :sm="3" :xs="3">
            <el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
              <el-button size="small">
                选择
                <i class="el-icon-upload el-icon--right"></i>
              </el-button>
            </el-upload>
          </el-col>
          <el-col :lg="{span: 1, offset: 2}" :sm="2" :xs="2">
            <el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
          </el-col>
          <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
            <el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
          </el-col>
          <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
            <el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
          </el-col>
          <el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
            <el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
          </el-col>
          <el-col :lg="{span: 2, offset: 6}" :sm="2" :xs="2">
            <el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
          </el-col>
        </el-row>
      </el-dialog>
    </div>
  </template>
  
  <script>
  import store from "@/store";
  import { VueCropper } from "vue-cropper";
  import { uploadAvatar } from "@/api/system/person";
  import { debounce } from '@/utils'
  
  export default {
    components: { VueCropper },
    data() {
      return {
        // 是否显示弹出层
        open: false,
        // 是否显示cropper
        visible: false,
        // 弹出层标题
        title: "修改头像",
        options: {
          img: store.getters.avatar,  //裁剪图片的地址
          autoCrop: true,             // 是否默认生成截图框
          autoCropWidth: 200,         // 默认生成截图框宽度
          autoCropHeight: 200,        // 默认生成截图框高度
          fixedBox: true,             // 固定截图框大小 不允许改变
          outputType:"png",           // 默认生成截图为PNG格式
          filename: 'avatar'          // 文件名称
        },
        previews: {},
        resizeHandler: null
      };
    },
    methods: {
      // 编辑头像
      editCropper() {
        this.open = true;
      },
      // 打开弹出层结束时的回调
      modalOpened() {
        this.visible = true;
        if (!this.resizeHandler) {
          this.resizeHandler = debounce(() => {
            this.refresh()
          }, 100)
        }
        window.addEventListener("resize", this.resizeHandler)
      },
      // 刷新组件
      refresh() {
        this.$refs.cropper.refresh();
      },
      // 覆盖默认的上传行为
      requestUpload() {
      },
      // 向左旋转
      rotateLeft() {
        this.$refs.cropper.rotateLeft();
      },
      // 向右旋转
      rotateRight() {
        this.$refs.cropper.rotateRight();
      },
      // 图片缩放
      changeScale(num) {
        num = num || 1;
        this.$refs.cropper.changeScale(num);
      },
      // 上传预处理
      beforeUpload(file) {
        if (file.type.indexOf("image/") == -1) {
          this.$modal.msgError("文件格式错误，请上传图片类型,如：JPG，PNG后缀的文件。");
        } else {
          const reader = new FileReader();
          reader.readAsDataURL(file);
          reader.onload = () => {
            this.options.img = reader.result;
            this.options.filename = file.name;
          };
        }
      },
      // 上传图片
      uploadImg() {
        this.$refs.cropper.getCropBlob(data => {
          let formData = new FormData();
          formData.append("avatarfile", data, this.options.filename);
          formData.append("personId", personId);
          uploadAvatar(formData).then(response => {
            this.open = false;
            this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl;
            store.commit('SET_AVATAR', this.options.img);
            this.$modal.msgSuccess("修改成功");
            this.visible = false;
          });
        });
      },
      // 实时预览
      realTime(data) {
        this.previews = data;
      },
      // 关闭窗口
      closeDialog() {
        this.options.img = store.getters.avatar
        this.visible = false;
        window.removeEventListener("resize", this.resizeHandler)
      }
    }
  };
  </script>
  <style scoped lang="scss">
  .person-info-head {
    position: relative;
    display: inline-block;
    height: 120px;
  }
  
  .person-info-head:hover:after {
    content: '+';
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    color: #eee;
    background: rgba(0, 0, 0, 0.5);
    font-size: 24px;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    cursor: pointer;
    line-height: 110px;
    border-radius: 50%;
  }
  </style>
  